During the panel, I made reference to an ongoing joke by Brian and myself to do a negative version of XFN — an XHTML Enemies Network. I always thought of it as a frivolous idea but sometimes I wonder if there might be the occasional real-world use case.

Suppose, for instance, that I wanted to link to Mike “The Dick” Arrington’s latest bit of bollocks over on TechC*nt? Well, now I can add some extra semantic richness to that link by throwing in the appropriate rel value.